From 625eaa034aacfb3209fb97efb3ecf664c1827e3a Mon Sep 17 00:00:00 2001 From: Curtis McEnroe Date: Tue, 5 Dec 2017 00:17:39 -0500 Subject: Day 5 --- 2017/src/bin/day05.rs | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 2017/src/bin/day05.rs (limited to '2017/src') diff --git a/2017/src/bin/day05.rs b/2017/src/bin/day05.rs new file mode 100644 index 0000000..b8e21d9 --- /dev/null +++ b/2017/src/bin/day05.rs @@ -0,0 +1,31 @@ +use std::io::{self, Read}; + +fn solve1(input: &str) -> u32 { + let mut jumps: Vec = input.lines() + .map(str::parse) + .map(Result::unwrap) + .collect(); + + let mut index = 0isize; + for step in 0.. { + if index < 0 || index >= jumps.len() as isize { + return step; + } + let jump = &mut jumps[index as usize]; + index += *jump; + *jump += 1; + } + unreachable!() +} + +fn main() { + let mut input = String::new(); + io::stdin().read_to_string(&mut input).unwrap(); + + println!("Part 1: {}", solve1(&input)); +} + +#[test] +fn part1() { + assert_eq!(5, solve1("0\n3\n0\n1\n-3\n")); +} -- cgit 1.4.1